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The Samsung LN46C630 TV has a known issue with screen flickering after the warranty has expired. Rather than pay $150 at your local repair show, fix it yourself in 15 minutes!

The fix for this issue is easy. There is a jumper on the power supply named JP852. If you cut that jumper, the screen flicker will no longer happen. I do not know what JP852 is used for, but apparently there is a service bulletin from Samsung for this fix. Thank you to Denise from an Amazon.com review (here) who provided the details on this fix.

Please assume this will void your warranty and potentially break your TV. After doing this fix on my own, my TV has been running fine since February 18, 2012 . I will update this guide if for some reason my TV stops working.

UPDATE June 14, 2012: It has been a few months and my TV still works great!
UPDATE December 31, 2012: My TV is still going strong. NO ISSUES TO REPORT!
UPDATE March 16, 2013: All is well! It has been over 12 months since I cut the jumper and everything still works as well as the day I bought it.
UPDATE June 19, 2013: Still going strong. NO ISSUES TO REPORT!
UPDATE October 19, 2015: NO ISSUES TO REPORT!

Step 1: Symptoms

The symptoms of this issue are mostly described as "screen flickering".  It mostly happens intermittently at first, then gets progressively worse.  HDMI connections start first, then component, etc.  If the user turns the TV off, then on, it usually fixes the issue for a little while, but it eventually comes back.  After a month or two, the screen will flicker be permanent.

The model fixed in this tutorial is a LN46C630K1F.  This fix is supposed to work for all TVs in this class.  I did see something online about this issue happening on other Samsung TVs in a different class and the fix was cutting a different jumper.

Step 2: Remove the back cover of the TV

There are 18 screws (there is a harder to find screw in between the two rows of component jacks).  A normal sized Phillips head works.  If you are leaving this TV on the stand base, remove the bottom two screws last and be careful, it just sitting on that base without any screws!  I recommend replacing the bottom two screws after you have the back cover off so you TV does not fall off the base.

Step 3: Find the power supply

The power supply is located where...  the power cord plugs in!

Step 4: Find jumper JP852

Jumper JP852 is located on the power supply in the top left corner just below the 46.  It connects something labelled 'Input rating' and another labeled 'COLD'

Step 5: Cut jumper JP852

This is easy and you can probably just use scissors.  Cut the jumper on the middle and separate the wire so it doesn't touch.  Put the case back on the TV and you're done!
I have a Samsung Full LED 50 in Smart TV. I cant find any tricks to fix our flickering problem...HELP!
Problem with flickering black light solved on other Samsung TV.<br><br>Just remove one of the cables labeled Pwm dim or e-Pwm. This signal is used to dim the backlash, remove it and it will burn full.
<p>its work for me model LS22c , I just remove the red wire between the power supply and processing board. The wire labelled as DIM but not PWM. I think both is same. Thanks you for give me some idea.</p>
Backlight....... Damn auto-correct.....
Fantastic!! Thank you!!
I have an LN52A650 that I've been having a flickering issue with. I found theJP852 wire but wanted to be sure it was still the same one to cut before I try it. The layout is totally different since it's a 52&quot;.
<p>I had an issue with my LN46C630K1F several years ago. Luckily, it was still under warranty. However, whatever the guy replaced didn't actually fix it. But, found that when I put it on standard instead of dynamic after leaving it off for some time. Two years later and today it's back flickering. I cut the JP852 wire, but to no avail. I have the same tv in the 40 or 42&quot; and never had issues. </p><p>Guess, it's time for a new tv unless anyone else has any other ideas. </p>
Can any body help is jp852 the small one or the bigger one
<p>The small one</p>
<p>I have a Samsung UA32D4000. I too am facing a major Flicker issue. I opened the TV and there is a JP852 on the board, however I am not sure if this is the solution for this TV model also, attached picture of the board. Please advise.</p>
Hi GauravD19 - i have the same screen, and have this issue. Did you get yours fixed? Was it the same jumper?
<p>No it was not the same jumper, I snipped it but the problem is not fixed !</p><p>I guess there is still no solution for this model.</p>
<p>OK - thanks for that. Guess it's time for a new screen then. </p>
what if that jumper is nowhere to be found!?<br>
<p>cut jp852 nothing works same double image</p>
<p>i have 32 samsung UA32D4000N model it double Image and flicker issue. plz help me...</p>
<p>I have a samsung model LN-S4051D. I snipped the J825 wire but the tv still has the blinking. But, I could plug something into the audio video plugs and it works fine. But nothing with HDMI with work. Any suggestions?</p>
My tv just blinks no pictire is showing anymore. Sound is on but that's all. Would this help of so which wore should I cut?
It's model UN60FH6003
<p>Would this work on a Samsung LN40E550?</p>
<p>thanks for posting this! Same model tv purchased in 2010. Snipped the jp wire and tv works great now. Thanks again!</p>
<p>mine is LN40C630 but the power supply is different which is my jp852</p>
I have the same. An LN40C630 also. Can't find anything labeled JP. Lots of JW's but no JP's. Any idea on what the 40&quot; equivalent of the JP852 is?
<p>Hi There</p><p>Nothing with JP, and only two digit numbers JWs on my TV. Any suggestion.</p><p>Did anyone give you an answer too this problem? If so can you pls let me know what jumper will work?</p>
<p>Hi there.</p><p> I have a issue with my 40 inch Samsung (model LN40B540FXZA). I took the back off and looked all over the board for the named jumper. But all I can see is jw numbered jumperes. Nothing with JP, and only two digit numbers, ex jw85 vs jp852. </p><p><br>Is there a fix for this model, or does it perhaps need a new power supply <br>Any info would be greatly appreciated! <br><br>Chris</p>
<p>Thank you! Screwdriver+ wire cutters + 15 minutes = FIXED</p>
<p>Glad to hear everyone is having so much success with fixing their TV! Sorry I can't help all of the people with different models, I can only confirm that it works on the model in my instructable.</p>
<p>I just did this to my Samsung 46&quot; LN46C630 TV. Took about 15 minutes to take the TV off the wall, remove the back panel, snip the JP852 jumper and it worked!!! No more flickering of the screen. I was going to go out and buy a new TV so this fix saved me $1000! Thanks!</p>
<p>And my TV is 5 years old!</p>
I just did this to my 5 year old tv, its been flickering for over 3 months, it got so bad that we put the tv away and used our old one. It works now! Absolutely amazing, thank you for the easy tutorial! Let's see how long it will last! Oh btw, we were going to throw it out, you just saved us a bundle!
<p>I just did this to my tv...went from flickering so bad that you could not use it. it works perfect now!!! thank you thank you thank you!</p>
What jumper do i cut to stop flickering screen? I do not have jp 852 jumper.
<p>Hey Guys! I suddenly faced Screen blinking issue in my Samsung 32F5100 TV which is just above 1 year old(Out of Warranty).</p><p>I Cudn find the JP 5854/JP 852 Jumper. It starts from JP 801 to JP 829 and some other series of Jumpers.</p><p>I called up the Service gut from Samsung and he has given a repair Estimate that would cost a new TV :(</p><p>It would be really great if someone can let me know how to fix this issue for my model </p><p>Samsung F5100.</p><p>Many Thanks!!!!</p>
Did anyone give you an answer too this problem? If so can you pls let me know what jumper will work?
Which one I need to cut to fix the flicker problem on the screen
I haven't seen anyone have answered for 40 inch TVs. I have LN40D630 but didn't find the exact jumper number from this forum. Note sure cutting the jump would really work.
Gotta love the Internet! <br><br>So exact same TV and started flickering a few months ago. First thought it was the DVD player but then started happening on every source (Rogers cable box, Apple TV and DVD player). Usually changing channel on cable would work or powering off and on but as posted here, it got worse and today nothing would fix it. <br><br>Took back cover off as described and found jumper and cut it! So far - so good. All works and so far no flickering. <br><br>Only issue I had was that the cover didn't go on correctly on the top of the set so I undid the two screws and reseated it with no problem. <br><br>I laid the TV face down on the coffee table with a blanket just to be safe. <br><br>Will you an update in a while. <br><br>Thanks!
<p>Update: Not that nothing displays; its actually the backlight that doesn't turn on</p>
<p>I just observed that when I cut the two jumpers the TV still does turn on cause I have Audio, only problem is nothing displays. </p><p>Any help on this matter will be sternly appreciated.</p>
<p>Hello, I have a samsung tv 32&quot; with Model Code: LA32D403E2XSW</p><p>I tried following the steps above but encountered a snag; mine had no JP852 jumper and it wasn't just one jumper located at the input section, mine had two jumpers labelled JP817 and JP804, so I proceeded to cut the two instead but then mine TV would only blink the red LED light in front of it - showing its about to turn on - but after that nothing happens. I reconnected each jumper cable separately but each time the same annoying flickering screen is what greets me 'good morning'. </p><p>Any suggestions as to what I'd try???</p>
Hello, I have a un55D8000 that started flickering yesterday. I followed the instructions to cut jp852. Now the tv doesnt come on at all. I soldered jp852 back together and still nothing. Any insight would be GREATLY APPRECIATED!
<p>I have the ln40a550 model, and there isn't a 852 or 854 cable on my board. Anyone know which one I need to cut?</p>
I have a Samsung 55&quot; led 3d TV model 8000. Will this fix work on it? The screen is flickering. Not going out or fading or motion freezing, but the brightness is flickering like a strobe light, hurting my eyes to watch. Seems like after it warms up a little while.
I have a 55 inch would this work for mine !!!!
<p>My Samsung 46&quot; television starting flickering or &quot;strobing&quot; about a month ago and had slowly gotten worse. After searching the internet I discovered the fix by cutting the jp852 jumper described in the Samsung service bulletin. I wasn't sure the TV would actually fire back up after cutting the jumper so I shopped around and decided what tv I would buy &amp; where I would buy just in case the procedure didn't work. It took about 30 minutes to disassemble the TV, locate the jumper, snip it and reassemble. Guess what! It was an easy fix, the TV fired back up, it's been 2 weeks &amp; it hasn't flashed once. Thanx, EANDA36.</p>
<p>I have a Samsung UE46C8000 (xw) and had very awful blinking problem. Blinking was stronger with bright pictures. It went worse and worse by time...</p><p>In my condition, first i cut J852 and my tv didn't start. Than i soldered it and cut J970. Working perfectly about 4 days without blink. I've tested all tv fonctions too (e.g. usb ports, hdmi ports, speakers, optic audio ports etc...). There is no problem now.</p><p>I think, people having blinking problem should be looking for &quot;input&quot; section at power supply card. It's in a rectangle area. There is only one jumper near &quot;input&quot;. Cut it...</p>
<p>Worked on my 46&quot; C610 (same board/jumper). Wonder how many Samsung tv's have ended up in the landfill when there is such a simple solution. One thing concerns me though. Could the flickering be caused due to something overheating? Is this fix creating a potential fire hazard if that is the case? The wire had to serve some purpose didn't it? Not especially worried, if something was going to happen it would happen sooner than later I would think. I'll just make sure its off if i'm not home. Thanks for saving me the cost of a new tv.</p>
<p>Hallo ich habe das Modell LE46C530F1W und hat bei mir auch prima geklappt.</p><p>Vielen Dank an diejenigen die sich die die m&uuml;he gemacht haben und uns somit geholfen haben.</p>
<p>i did it and everything is good, but in HDMI the screen is showing good, then the screen goes black and make the same!</p>

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